lola
you sound like a t1 to me, what with the weight loss & thirst/tiredness...but i'm no doctor so don't take it from me!
perhaps your bg's are good now because you take the insulin, often there is a 'honeymoon period' in newly diagnosed type 1's where the pancreas is still producing insulin, so it is guesswork to work out how much insulin you need to take until there is finally no insulin being produced (confusing huh?)
are you feeling alot better since being on insulin? many t1's didn't realise they were so poorly until they start taking insulin and miraculously feel 'normal' again without realising they were not normal before!
don't be afraid, armed with your bg meter, you will be able to track what is going on...if your doc insists they want you to try tablets, you could try...your meter will tell you how that is affecting your bg - if you run high then you know tablets are not the answer and you ain't a t2 (i think sometimes they like to try this to be more 'sure' that you are t1, i think this happened in my case - but this is an unprecise science because of the honeymoon period)
time will tell...if you start running high then call your diabetes specialist nurse/doctor straight away - they will be able to monitor your situation with you and make decisions to change medication if needed.
good luck with all this, how daunting for you. it will all settle down in time, you will get a feel for things - make your glucose meter your new best friend for now & record all your readings - you'll be able to track what's happening
(by the way, type 2 to me seems a completely different ballgame to type 1, so i can't comment with a huge degree of knowledge...but in my opinion it is different; negatives are you can't eat what you want but can control your bg more by being very careful of what you eat. positives are no insulin injections and bad hypo's! saying that, i know many t2s have to take insulin also but i think this tends to happen as is progresses.)
do keep in touch!
weezer x